Person
Bartolomé de Medina
Bartolomé de Medina was a Spanish merchant who in the 1550s at Pachuca in New Spain developed the patio process, which extracted silver from ore by mixing it with mercury, salt and copper sulphate in open yards. The method made it profitable to work low-grade ores, and it spread to Peru and was used across Spanish America for three centuries, greatly increasing silver output.
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- APA
- The Epoch Institute. (2026). Bartolomé de Medina. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/bartolome-de-medina
- MLA
- “Bartolomé de Medina.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/bartolome-de-medina. Accessed .
- Chicago
- The Epoch Institute. “Bartolomé de Medina.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/bartolome-de-medina.
- Harvard
- The Epoch Institute (2026) ‘Bartolomé de Medina’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/bartolome-de-medina (Accessed: ).
Last reviewed October 2026Random entry ↻